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Preprints
https://doi.org/10.5194/egusphere-2024-2414
https://doi.org/10.5194/egusphere-2024-2414
20 Aug 2024
 | 20 Aug 2024

Air Pollution in The Upper Troposphere: Insights from In-Situ Airplane Measurements (1991–2018)

Kuo-Ying Wang, Philippe Nedelec, Valerie Thouret, Hannah Clark, Andreas Wahner, and Andreas Petzold

Abstract. Long-lived atmospheric species like carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and CFCs exhibit discernible trends reflecting anthropogenic emissions, with increases observed in CO2, CH4, N2O, and decreases in CFCs. Conversely, trends for short-lived species like carbon monoxide (CO) and nitrogen oxides (NOx) remain less understood due to rapid chemistry and limited upper tropospheric observations. We utilize extensive in-situ CO measurements spanning 2012–2023, supplemented by prior airplane campaigns from 1991–2019, to examine short-term fluctuations in CO influenced by anthropogenic emissions and rapid chemical removal. Comparisons with MOPITT satellite data and chemistry budgets from 1948–2003 simulations further elucidate the interplay of sources and sinks, revealing the significant impact of chemistry on CO profiles and trends.

Competing interests: At least one of the (co-)authors is a member of the editorial board of Atmospheric Chemistry and Physics: Andreas Petzold

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
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We use routine in-service commercial passenger airplanes Airbus A340 and A330 to collect air...
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